#include <Arduino.h>
#include <OneButton.h>

#define POWER_BUTTON 28
#define POWER_LED 27

static bool switched = false;
static bool lightup = false;
static bool turnoff = false;

static unsigned long currentTime;
static unsigned long previousTime = 0;
static unsigned long timeClicked;
const int timeInterval = 200;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(POWER_LED, OUTPUT);
  pinMode(POWER_BUTTON, INPUT_PULLUP);
}

void loop() {
  // put your main code here, to run repeatedly:
  currentTime = millis(); // first priority!
  if (digitalRead(POWER_BUTTON) != 1) {
    timeClicked = millis();
    switched = !switched;
    delay(150);
    while (currentTime - timeClicked <= 500) {
      if (digitalRead(POWER_BUTTON) != 1) {
        turnoff = !turnoff;
        delay(350);
      }
      currentTime = millis();
    }
  }
  
  if (currentTime - previousTime >= timeInterval) {
    if (turnoff) {
      digitalWrite(POWER_LED, LOW);
    } else if (switched && lightup) {
      lightup = false;
      digitalWrite(POWER_LED, LOW);
      previousTime = currentTime;
    } else if (switched && !lightup) {
      lightup = true;
      digitalWrite(POWER_LED, HIGH);
      previousTime = currentTime;
    } else {
      digitalWrite(POWER_LED, HIGH);
    }
  }

}